A Domain Name System (DNS) server resolves host names into IP addresses. Although we can access a network host using its IP address, DNS makes it easier by allowing us use domain names which are easier to remember. For example its much easier to access google website by typing http://www.google.com as compared to typing http://208.117.229.214. In either case, you’ll access google website, but using domain name is obviously easier.
Now, before any host can use a DNS service, we must configure a DNS server first. For example, when you type the URL http://www.google.com in your browser, the host will query the DNS server for the IP address of http://www.google.com. The DNS server will resolve http://www.google.com into an IP address then answer back the host with the IP address.
Now let’s configure a DNS server in Packet Tracer.
1.Build the network topology.
2.Configure static IP addresses on the PCs and the server.
Server
IP address: 192.168.1.2 Subnet mask: 255.255.255.0 Default gateway: 192.168.1.1 DNS Server: 192.168.1.2
PC0
IP add: 192.168.1.3 Subnet mask: 255.255.255.0 Default gateway: 192.168.1.1 DNS server: 192.168.1.2
PC1
IP address: 192.168.1.4 Subnet mask: 255.255.255.0 Default gateway: 192.168.1.1 DNS Server: 192.168.1.2
3.Configure DNS service on the generic server.
To do this, click on the server, then Click on Services tab. Click on DNS server from the menu. First turn ON the DNS service, then define names of the hosts and their corresponding IP addresses.
For example, to specify the DNS entry for PC0: In the name and address fields, type:
Name: PC0 Address: 192.168.1.3
Click on add then save. Repeat this for the PC1 and the server.
Once you’re done, your DNS entries will look like this:
Finally,
4. Test domain name – IP resolution. Ping the hosts from one another using their names instead of their IP addresses. If the DNS service is turned on and all IP configurations are okay, then ping should work.
For example, ping PC1 from PC0. Ping should be successful.
Success! Success!
Hope you found this tutorial of use to you. Leave a comment in the comments section to help improve it. Likes are welcome too.
You may also like to read:
- DHCP configuration in Packet Tracer.
- HTTP server configuration in Packet Tracer.
- Mail server configuration in Packet Tracer.
- How to configure an FTP server in Packet Tracer
Computer Networking Tips 
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